Patents by Inventor Charles W. Ulmer, II

Charles W. Ulmer, II has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Impact resistant polymers based on bisphenol-A-polycarbonate
    Patent number: 5629404
    Abstract: A high impact polymer comprising repeating monomer units of the formula: ##STR1## wherein R.sub.2 and R.sub.2 are substituents selected from the group consisting of hydrogen, an alkyl group, an aryl ring and a group promoting hydrogen bonding with a hydrogen atom of a phenyl ring, at least one of R.sub.1 and R.sub.2 being from the group promoting hydrogen bonding.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 13, 1997
    Inventors: Douglas A. Smith, Charles W. Ulmer, II